Metal cap.



0. HAMMER. METAL GAP.

APPLICATION FILED MAR. 13, 1911.

997,807, l Patented July 11, 1911.

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WITNESSES: mn/f/vroe A TTORNEYS '1 are.

CHARLES HAMMER, OF NEW YORK, N. Y., ASSIGNOR TO AMERICAN METAL CAP COM- IANY, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.'

METAL CAP.

Specification of Letters Patent. Patented July 11, 1911.

Application filed March 13, 1911. Serial No. 614,108.

To all whom it may concern: Be it known that I, CHARLES HAMMnR,.a citizen of the United States, and a resident of the borough of Brooklyn, city of New.

York, county of Kings, and State of New York, have invented certain new and useful Improvements in Metal Caps, of which the following is a full, clear, and exact description.

This invention relates to certainimprovements in metal caps for use in connection with bottles, jars or other similar vessels, which have a neck upon which the cap may be secured by a rotating or turning movement.

More particularly my invention relates to that type in which the cap has a peripheral flange and inwardly-directed projections for engagement with threads on the bottle neck.

The glass bottles or jars of the type to which my cap is particularly applicable are formed with an annular bead, upon the outer surface of the neck, and spaced a short distance from the mouth of the bottle and between this bead and the month are a plurality of short ridgesforming screw threads.

In practice, there is invariably a slight vari ation in the size of the bottle neck, the distance from the mouth to the bead and the diameter of the bead. I

The main object of my invention is-to so form the cap that the projections will properly engage with the threads, irrespective of slight variations in the size ofthe neck, and the bead will not prevent the cap from being properly screwed into place, even though said bead be somewhat larger than the average.

A further object of my invention is to Reference is to be had to the accompanying drawings, which form a part of this specification, and in which similar reference characters indicate corresponding parts of the different drawings.

Figure 1 is a side elevation of a bottle provided with my improved cap; Fig. 2 is a side elevation of the upper portion of the bottle,the cap being removed; Fig. 3 is a side elevation of the cap, itself, removed y 1 a plurality of inclined ridges 12 intermediate between the bead and the mouth and forming screw threads. The cap itself has a peripheral band portion 13 and a top portion 14, which may or may not be connected together. As shown, they' are integrah The flange or peripheral band 13 is substantially cylindrical, and has a plurality of depending tabs or extensions 15, the number corresponding to the number of screw threads 12. Within each tab, lug or extension, there is a transverse slit 16 below the basal edge of the flange or band, and preferably inclinded at an angle corresponding with the angle or pitch of the threads 12. The slit is somewhat shorter than the width of the tab, so as to leave connecting portions 17 ateach end of the tab, and the portion of the tab directly below the slit is struck inwardly so as 'to form a shoulder or projection'18. The band of the cap is of such size that it may fit down over the threaded portion of the neck, and the projections are so disposed that they may engage with the screw threads of the bottle neck and draw the cap firmly into place as the latter is rotated. The lower end of the tabs or extensions frictionally and resiliently engage'with the outer surface of the bead of the neck, and thus act to retard the final turning movement of the capin screw ing the latter. in place, and likewise to resist and prevent the accidental turning loose of the cap. In case the head is somewhat larger than the average size, the tabs may readily bend outwardly, due to the resiliency of the metal, and thus accommodate themselves to beads of any size. As the projections are carried by the tabs, it is evident that an outward bending of the tab will slightly lower the projection carried thereby. Thus in case one of the screw Y threads of the neck be slightly lower than the remainder, the particular tab in engagement therewith may bend inwardly and permit its projection to accommodate itself to the thread. The metal portions 17 at the ends of the slit are comparatively narrow, and the cap is preferably made of thin metal, so that in case the contents of the bottle or jar shbuld act to glue or adhesively secure the inner surface of the cap to on to the bottle again, in case it is desired to reclose the latter. By forming the projections upon depending tabs, the peripheral flange or band portion 13 may be made very narrow and thus a material saving of metal effected. In laying out the blanks on a sheet, each cap will require an amount of space dependent upon the diameter of the cap and the width of the flange. The tabs need not be taken into consideration, as they may be arranged to come out of the metal which would otherwise bewasted. This is shown particularly in Fig. 6. It will be seen that the narrower the bandcan be made, the greater will be the saving of the metal and, consequently, the less will be the cost to manufacture.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is:

l. The combination with a bottle or jar, having a threaded neck and an annular encircling bead, a sheet metal cap having a top or body portion and a peripheral band and tabs integral with said band and depending from the lower edge thereof, and each having an inwardly extending projection below the lower edge of the band and above the lower end of the tab, for engagement with said threaded neck, the tabs below their projections serving to resiliently engage said head, and the tabs being bendable outwardly to permit disengagement of their respective projections from said threaded neck.

2. A cap for bottles and jars having a peripheral sheet metal band presenting at its lower edge depending lugs integral therewith, each lug having a transverse slit below the basal edge of the band and above the lower end of the lug, a port-ion of the lug at the lower side of the slit being bent inwardly to forma projecting shoulder and the portions of the metal at the ends of the slit being comparatively narrow, and permitting the portion of the lug below the slit and its projecting shoulder to be bent outwardly.

3. A cap for bottles and jars having a peripheral band presenting depending lugs,

each lug having an inwardly projecting shoulder intermediate its upper. and lower edges.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLE s HAMMER.

Witnesses:

CLAIR W. FAIRBANK, MARTIN BOURKE. 

